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Class Information
Number: 356/411
Name: Optics: measuring and testing > By shade or color > Fluid color transmission examination > Of flowing liquids > With plural light detectors (e.g., photocells)
Description: Subject matter including more than one photosensitive device.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7615730 |
Device and method for measuring wavelength of an optical signal |
Nov. 10, 2009 |
| 7561271 |
Source adjusted colorimeter |
Jul. 14, 2009 |
| 7479625 |
Sensing photons from object in channels |
Jan. 20, 2009 |
| 7468796 |
Multiple-color monochromatic light absorption and quantification of light absorption in a stained sample |
Dec. 23, 2008 |
| 7414724 |
Light diffuser used in a testing apparatus |
Aug. 19, 2008 |
| 7358476 |
Sensing photons from objects in channels |
Apr. 15, 2008 |
| 7291824 |
Photosensing throughout energy range and in subranges |
Nov. 6, 2007 |
| 7218656 |
Control of spectral content of a laser diode light source |
May. 15, 2007 |
| 6657718 |
Measuring cell for liquids |
Dec. 2, 2003 |
| 6486957 |
Replaceable filter module |
Nov. 26, 2002 |
| 6398914 |
Method and device for process control in cellulose and paper manufacture |
Jun. 4, 2002 |
| 6362887 |
Device for measuring changes in parameters within transparent objects |
Mar. 26, 2002 |
| 6061141 |
Method and system for detecting gases or vapors in a monitored area |
May. 9, 2000 |
| 6057912 |
Method for Blackbody lamp reference compensation using a single silicon photodiode |
May. 2, 2000 |
| 5825478 |
Multifunctional photometer apparatus |
Oct. 20, 1998 |
| 5745243 |
Photometer apparatus |
Apr. 28, 1998 |
| 5699156 |
Spectrophotometer apparatus with dual light sources and optical paths, fiber optic pick-up and sample cell therefor |
Dec. 16, 1997 |
| 5682038 |
Fluorescent-particle analyzer with timing alignment for analog pulse subtraction of fluorescent pulses arising from different excitation locations |
Oct. 28, 1997 |
| 5661558 |
Optical detector for flowing sample and optical detection method for flowing sample |
Aug. 26, 1997 |
| 5526122 |
Method for determining the mass flow of gases on the basis of optical absorption and employment of said method |
Jun. 11, 1996 |
| 5483334 |
System for generating the same instantaneous pressure between two tanks |
Jan. 9, 1996 |
| 5483057 |
Glass color sensor unit |
Jan. 9, 1996 |
| 5432096 |
Simultaneous multiple, single wavelength electromagnetic wave energy absorbtion detection and quantifying spectrophotometric system, and method of use |
Jul. 11, 1995 |
| 5423513 |
Method of and a capillary flow cell for analysing fluid samples |
Jun. 13, 1995 |
| 5418614 |
Optical photometry system for on-line analysis of fluid systems |
May. 23, 1995 |
| 5307146 |
Dual-wavelength photometer and fiber optic sensor probe |
Apr. 26, 1994 |
| 5274227 |
Capillary detector cell having imaging elements positioned to optimize sensitivity |
Dec. 28, 1993 |
| 5272090 |
Sensor element for determining the amount of oxygen dissolved in a sample |
Dec. 21, 1993 |
| 5124130 |
Optical probe |
Jun. 23, 1992 |
| 5121164 |
Method for maintaining a liquid composition |
Jun. 9, 1992 |
| 5073345 |
Light detector apparatus |
Dec. 17, 1991 |
| 5002397 |
System of fluid inspection and/or identification |
Mar. 26, 1991 |
| 4998824 |
System of fluid inspection and/or identification |
Mar. 12, 1991 |
| 4900152 |
Apparatus for measuring foreign substance content in a flowing liquid |
Feb. 13, 1990 |
| 4878756 |
Method and apparatus for sensing color |
Nov. 7, 1989 |
| 4822168 |
Spectroscopic photometer for flow through sample absorption |
Apr. 18, 1989 |
| 4726680 |
Absorbance monitor |
Feb. 23, 1988 |
| 4637730 |
Optical and electronically compared absorptiometer |
Jan. 20, 1987 |
| 4601582 |
Spectrophotometer |
Jul. 22, 1986 |
| 4566791 |
Fluid sample cell comprising Fresnel sectors |
Jan. 28, 1986 |
| 4519710 |
Colorimeter |
May. 28, 1985 |
| 4514257 |
Method of measuring fines in pulp suspensions |
Apr. 30, 1985 |
| 4498774 |
Micro-polarimeter for high performance liquid chromatography |
Feb. 12, 1985 |
| 4468124 |
Double beam photometer for measuring fluid samples |
Aug. 28, 1984 |
| 4441188 |
Dye lasers |
Apr. 3, 1984 |
| 4379637 |
Radiation measuring apparatus |
Apr. 12, 1983 |
| 4374322 |
Apparatus for controlling the absorption of one or more color components in a dyeing fluid |
Feb. 15, 1983 |
| 4367041 |
Chromatograph detection system |
Jan. 4, 1983 |
| 4329048 |
Light absorption spectrum analyzer |
May. 11, 1982 |
| 4273449 |
Radiation measuring apparatus |
Jun. 16, 1981 |
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